Tension device



Aug. 12 1924. 1,504,674

C. A. BRINK TENSION DEVICE Filed Dec. 19. 1921 Patented Aug. 12, 1924.

UNITED STATES PATENT OFFICE.

CARL A. BRINK, or CRANSTON, RHODE ISLAND, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE NEW ENGLAND TRUST COMPANY, A CORPORATION OF MASSACHUSETTS,

TRUSTEE.

TENSION DEVICE.

Application filed December 19, 1921.

and useful Improvements in Tension De vices, of which the following is a specification.

My lnvention relates to 1mprovements in tension-devices for use with winding machines and other textile apparatus. 7

One object of the invention is to provide a device of the type specified in which a more constant and uniform degree of tension may be applied to the running yarn,

thread or other filament.

Another object of the invention'is to provide a tension-device in which the pressure of the tension-means is controlled without 2 fluctuation and prevented from undue influence under jar or vibrationof the machine or other apparatus to which it is applied.

Another object of thei'nvention is to provide means for gradually varying the amount of tension applied to the yarn in accordance with a predetermined cycle of operations in the functioning of the machin to which the device is applied.

Further objects of the improvement are describes a preferred embodiment of the invention as illustrated in the accompanying drawings.

In the drawings Fig. 1 is a side elevation of my improved tension-device Fig. 2, a transverse sectional view of the same, taken on the line 22 of Fig. 1; and

Fig. 3, a plan view of the device in part section on the line 33 of Fig. 1.

Referring to the drawings, my improved tension-device is herein shown as mounted on a frame or bracket which, in its present embodiment, comprises two parts 4 and 5. The main part 4 of the bracket consists of a horizontal arm or support 6, from the outer end of which rises a vertical wall 7 having an extension 8 forming one half of of the bracket is complementary to the ex tension 8 and is fastened to the side of the wall or upright 7 by means of bolts or set forth in the following specification which Serial No. 523,553.

screws 9. The base of the housing or cage is constructed in the form of a shelf 10, see Fig. 2, which is inclined downwardly at its outer end, and rising from the edge of the shelf are two curved arms or rims 11.

Supported from the shelf portion 10 of the main bracket part 4 is a hub-like bearing 14 which is bored to receive a stud or pin 15 fastened therein by suitable means,

such as a set-screw 13. The stud 15 serves as the bearing for a pair of rotatable tension-disks 16 and 17 constituting the pressure-elements which bear upon the yarn or thread g passing between the disks. As shown in Figs. 2 and 3, the tension-disks 16 and 17 are preferably constructed of sheet metal blanks struck up in concavo-convex form to provide that they bear against each other only at a oint adjacent their periphcries. Outward y beyond the bearing point of the disks their rims are flared away to provide a V-shaped entrance groove for the yarn to facilitate the operation of drawing it into position between the sides of the disks. Referring to Fig. 2, the hub 14 which supportsthe bearing-stud 15 for the tension-disks is cupped out or recessed on one side to adapt it to receive the end of a coiled spring 19. The spring 19 surroundsthe stud 15 and bears at its opposite end against the side of the disk 17. Outwardly beyond the disks the stud 15 is formed with an enlarged, cylindrical head'20 having an inclined or beveled face 21 disposed opposite the side of the outer disk 16. Extending in an axial direction through the head 20 is a small hole 22 adapted to receive the end of a length of wire 24. The wire 24 is coiled into a ring 25 extending in a plane at right-angles to the axis of the stud 15 and terminating in an upright extension or finger 26. The ring 25 bears against the side of a thin washer 27, preferably constructed of felt or similar yielding material,

and the washer, in turn, bears against the side of the outer tension-disk 16. The wire 24 is slidable in the hole 22 in the head 20 and with its ring 25 constitutes a pressermember for acting against the disk 16.

At the left hand end of the main bracketmember 4 is an arm 28, see Figs. 1 and 3, which is provided with a counter-bored hole 29. "An arm or lever 30, preferably formed 'the finger 26 of the. ring or presser-member 25. 'A lateral prying force is applied to the rod or lever 30vby means of weights 35 suspendedjthereon. As shown in Fig. 1, the

- weights 35 are carried on a spindle or skewer 36 having an eye .37 at the upper end for i suspending it on a hook 38. The hook 38 is bent into a loop 39 adapted to befhooked over the topof the lever 30, and provided with'an extension or link 40 from which it maybemanipulated toslide the weights alongthe lever to vary their pressure on the tension-disks in the manner andfor the purpose asfhereina'fter more fully explained.

In some instances, where the device is' to be used without requirement forv automatic variation vin the amountof tension applied to'theyarn, manual adjustment is effected by placing the weights on the lever in dif-.

Iferen't positions in relat-i'onsto the fulcrum of the 'latter. For this purposethe weighthook 38 may be constructed without. the

extension or link 4'0 and the rod or lever iimayx be provided with notches with V awell known arrangement. I

which the hook engages in accordance with It will be understood thatby shifting the weights away from the fulcrumor pivot ofthe lever 30the force of-the latter will beaugmented, whereby it will act against thebeveled face 21 on the'head 20 of the stud 15' to apply increased pressure upon ft-hering 25 which bears against the tensiondisk 16.; Likewise when the; weights are shifted-inLthejdpposite direction, or toward thef fulcrunrKof the lever'30, the forceqof the latter is decreased to diminish the pressure onthe'diskltl. In winding machines {forwinding largeicops or cones of thread orya'rn it is a; usual practice to reduce the tension. applied .to the yarn as the latter travels at an increasing rate due to the in-' crease in diameter of the package. Any

suitable means may be employed for'movgring. the weights along the pressure'lever '30 and as generally provided such means are operated from the receding movement of. the thread-guide with respect to the axis of the package being wound. For instance, in

U. S. Letters Patent No. 506,959, granted 1 October17; 1893, to Simon W. lVardwell,

a system 'of connected leversis used for effectinga shifting of the tension weights to Y 7 relievethe-tension on the yarn as the cop Y U: SfiLetters Patent No. 682,770,

or package increases in diameter; and in September 17,1901, to the same inventor,

granted 1 the movement of the traverse-frame which carries the thread-guide is employed in the same manner for varying the pressure applied. by the tension-weights. In the present invention the tension-weights may be shifted along the lever 30 by connecting the arm 40 to the traverse-frame of the winding machine, or any equivalent means arranged to be moved by the recession of the thread guide during the growth in the cop being 4, 5, see Figs. 2 and 3, is drawn in between the disks 16 and 17 and across the pin or stud 15, as shown in Fig. 1. From the stud 15 the yarn 3 leads to the winding machine or other apparatus where it is taken up in the process for which the machine is operated. As the yarn 3 draws across the axial pin 15 in a tangential direction in relation thereto it has a tendency to rotate the tension-disks 16 and 17 with a relatively slow motion. This action prevents the yarn from wearing or cutting a groove in the faces of the disks as the latter are pressed against the yarn to resist its draft to apply the desired tension thereto. As before explained, the degree of tension applied to the yarn is dependent upon the amount of pressure exerted by the lever 30 to force the disk 16 toward the disk 17, and this may be varied by shifting the pressure-weights 35 toward or away from the fulcrum of the lever. The force of the weights 35 is applied to the lever 30 to cause the latter to be wedged laterally against the presser-rin g 25 through the action of the beveled face 21 on the side of the lever. The pressureof the ring 25 against the side of the washer 27 acts on the disk 16 to force it toward the disk 17 and movement of the latter is resisted by the spring 19. In this Way a yielding pressure is applied to maintain the disks bearing upon the yarn 3 so that when knots, bunches or enlargements thereon pass between the disks the latter will readily separate without exerting undue resistance to the draft of the yarn. This yielding action is accomplished by the contraction of the spring 19, without requiring that the lever 30 be lifted or otherwise displaced, and therefore it is not required to lift the weights 35. Through this provision the inertia of the weights remains undisturbed so that they are prevented from jumping or vibrating as in other previous devices where the pressure is applied through similar means. The tension-weights are thus caused to act with a uniform and constant pressure whereby 1rregularities are prevented, and thus an improved effect is produced in the tension ap the disk 16 further tends tosteady thelever to prevent it from jumping or vibrating and in this way the effects of momentum andinertia are eliminated and a smoother and more constant action secured. f

Various modifications may be made in the form and construction of my improved device without departing from the spirit or scope of the invention; therefore, without limiting myself to the precise embodiment herein shown and described, I claim: 1. In a tension-device, the combination with means adapted to bear upon a running yarn or filament to apply tension thereto, of means to control the action of the tensionmeans comprising a movable member, means to apply pressure to the movable member and an element having a beveled face against which the movable member acts to exert a constant wedging thrust against the tension-means.

2. In a tension-device, the combination with means adapted to bear upon a running yarn or filament to apply tension thereto, of a weighted member for applying pressure to said tension-means, and a fixed element provided with an inclined face against which the weighted member acts to wedge it against the tension-means with a constant pressure.

3. In a tension-device, the combination with means adapted to bear upon a running yarn or filament to apply tension thereto, of means for exerting pressure on said tensionmeans comprising two coacting elements, one fixed and the other yieldable and with one of said elements having a beveled face for wedging the other element toward the tension-member with a constant pressure.

4. In a tension-device, the combination with means adapted to bear upon a yarn or filament to apply tension thereto, of a weighted member for applying pressure to the tension-means, and a fixed member against which said weighted member acts, said fixed member being provided with a beveled face against which the opposite member acts to convert the force of the weighted member into a wedging action to apply a constant uniform pressure to the tensionmeans.

5. In a tension-device, the combination with means adapted to bear upon a yarn or filament to apply tension thereto, of a fixed element provided with an inclined face, and a movable element operated under pressure to act against said face to exert a constant wedging thrust upon the tension-means.

6. In a tension-device, the combination with opposite tension-members adapted to bear upon a running yarn or filament drawing therebetween, of a lever for applying pressure to said tension-members to force them together, and means provided with an angular face against which the lever acts to cause it to exert a wedging thrust on the tension-members to apply a constant pressure thereto.

71 In a tension-device, the combination with opposite tension-members adapted to bear'upon a running yarn or filament drawing therebetween, of resilient means for pressing against one of said tension-members, and means for applying pressure to the opposite tension-member comprising two 00- acting elements one fixed and the other move able and one of which is provided with an inclined face for exerting a'constant wedging force against the other element.

8. In a tension-device, the combination with a pair of tension-members, of means for yieldingly supporting said members to adapt them to bear upon a running yarn drawing between them, and a pair of coacting elements one fixed and the other movable and having wedgingengagement one with the other to adapt them to exert a constant pressure to cause the tension-members to press upon the yarn.

9. In a tension-device, the combination with a bearing-stud, of a pair of tensiondisks mounted on said stud, a lever adapted to bear laterally against the disks to apply pressure thereto, and means provided with a beveled face with which the lever engages to cause a constant lateral thrust thereon.

10. In a tension-device, the combination of a stud formed with an enlargement at its end provided with a beveled face on its side, a pair of tension-disks mounted on said stud, and pressure-operated means acting against the beveled face on the stud to wedge against the tension-disks to apply a constant lateral thrust thereon.

11. In a tension-device, the combination with a pair of tension'disks, of a member provided with a bearing face arranged in inclined relation to the side of the disks, and a pressure-member adapted to bear against the inclined face to cause the pressure-member to be thrust laterally against the tensiondisks with a constant pressure thereon.

12. In a tension-device, the combination with a bearing stud, of a pair of tensiondisks mounted on said stud, resilient means bearing against the side of one of the disks, pressure-means adapted to press against the side of the opposite disk, and a fixed element having an inclined face against which said pressure-means acts to cause said pressuremeans to be displaced laterally to exert a thrust on the tension-disks with a constant pressure thereagainst.

13. In a tension-device, the combination with a pair of tension-disks, of a pivoted and weights adjustable on the lever to vary its pressure on the disks. V 1 -14.;111 a tension-device, the combination of a stud having a head formed with a beveled face on its side and a hole extending parallel with its axis, a pair of tension-disks mounted on the stud, a Wire slidable in the hole inthe head of thestud and provided with acoiled extension bearing against the jside'of oneof the disks, and a lever adapted to engage the beveled side of the head of the 'Wir'e coil to press the latter against the tenstud to cause it to exert alateral thrust on the sion-disksg v V 315. In ELJlZQllSlQH-(lGVlCG, the combinatlon with a stud provided with a bevel-sided enlargement at its end, a pair of tension-disks mounted on said stud, a ring bearing against the side of one of the disks, and pressure means acting against the beveled face of the stud to force it against the ring to apply a lateral thrust on the tension-disk.

16.'In a tension-device, the combination with a stud provided with a beveled head at its end, a pair of tension-disks mounted on said stud, a resilient washer bearing against the side of one of the disks, a ring bearing against the washer, and pressure means engaging the beveled head of the stud to force it against the ring to cause the latter to exert pressure on the disk.

' In testimony whereof I afiix my signature.

CARL A. BRINK. 

